Childers VI-CRYL CP-10/11 weather barrier coating is a durable water based vinyl-acrylic mastic coating for thermal insulations. CP-10/11 is a tough, durable, and fire-resistive water based mastic for most types of thermal insulation and finishing and insulating cements. It is very thixotropic – it looks heavy but spreads easily. It is available in a variety of standard and special fade-resistant colors. It is outdoor rated and U.V. resistant. It comes in two grades for trowel application (CP-10) or spray / brush application (CP-11).